Summary of Oil Formation, Distribution, and Impacts
Formation of Oil
Petroleum is formed from decomposed aquatic plants and animals buried under mud and silt for millions of years.
Requires suitable source rocks for marine deposits.
Hydrocarbons must move laterally through permeable pathways to reach reservoir rocks.
Reservoirs need a cap rock to seal them and a trap to prevent migration of hydrocarbons.
Distribution of Oil
Major modern petroleum deposits are in sedimentary basins.
Significant oil discoveries began in the 19th century in places like Pennsylvania, followed by explorations in Canada, Russia, and the Middle East.
Countries like Venezuela, Mexico, and Iran became important oil producers throughout the 20th century.
Types of Oil Sources
Conventional Sources: Crude oil extracted under natural pressure.
Non-Conventional Sources: Includes tar sands and oil shale; extraction involves more complex processes.
Tar sands contain heavy bituminous material; extraction involves distillation methods.
Oil shale is heated in closed containers to yield hydrocarbons.
Oil Reserves
Proven Reserves (1P): Highly likely to be economically recoverable (>90%).
Probable Reserves (2P): Medium probability of recovery (>50%).
Possible Reserves (3P): Lower probability of recovery (>10%).
Global proven reserves as of 2020: 1732.4 billion barrels.
Oil Consumption and Production
Oil consumption trends vary by region, North America leads in consumption.
Significant oil production occurs in the Middle East, North America, and Russia.
Oil Price Trends
Oil prices have historically fluctuated due to geopolitical events like wars and supply interruptions.
Major events influencing prices include the Yom Kippur War (1973) and Gulf Wars.
Crude oil price history demonstrates volatility influenced by global economic contexts.
Peak Oil Theory
Suggests that oil production will peak and decline, impacting future oil availability.
Predictions indicate that peak oil may be reached around 2030, with significant extraction expected until 2060.